Machine for filling valve bags



A. W. TYLER.

MACHINE FOR FILLING VALVE BAGS. APPLICATION man MAR. 20,1920.

1 ,437,876, Patented Dec. 5, 1922,

Patented Dec. 5, 1922.

ALVA W. TYLER, OF CHICAGO, ILLINOIS.

maxim: FOR FILLING VALVE BAGS.

Application filed larch 20, 1920. Serial No. 367,462.

To all wlwm it may concern: I

Be it known that I, ALVA W. T nan, a citizen of the United States, and aresident of Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Im rovements in Machines for FillingValve ags; and I do hereby declare that the following is a full, clear,and-exact description thereof, reference bein had to the accompanyingdrawings, an to the letters of reference thereon, which form a part ofthis specification.

This invention relates to'improvements 1n machines for filling valvebags and consists of the matters hereinafter described and moreparticularly pointed out in the appended claims.

The object of the invention 18 to provide an improved filling device ortube so constructed, that when used in filling paper bags or bags madeof like air-tight fabric, the air displaced in the bag by the materialbeing fed thereinto, will be vented or permitted to escape, so that thebag may be completely filled. The several advantages of the inventionwill more'fully appear as I roceed with'my specification.

n the drawings Fig. 1 is a view in side elevation, largely in section ofa bag filling machine embodyin my invention;

ig. 2 illustrates, on an enlarged scale, a longitudinal, verticalsection through the filling tube thereof.

-Fig. 3 illustrates a transi erse, vertical section through the fillingtube, the plane of the section being indicated by the line 3-3' of Fig.2.

Fig. 4 illustrates a transverse vertical section through a modified formof filling tube. a

The invention is herein illustrated and described as embodied in amachine for filling bags which have a small filling opening in thebottom end, which opening is closed after the bag has been filled, by afia or valve forming a part of the bag, w ich valve is held in itsclosed position by the material within the bag.

Referring now in detail to that embodiment of the invention illustratedin Figs. 1 to 3 inclusive of the accompanying drawings; 5 indicates thehopper or bin for holding the dry, pulverulent material with which thebags are to be filled. The bottom end of ried by an apron 13 the hopperis formed to provide a cylindrical feed chamber 6, havin a horizontallydisposed discharge mouth In the feed chamber is a rotary propeller 8,which forces the material from the feed chamber out through thedischarge mouth 7 To the end the mouth 7, is fixed a closure plate -9,in which slides a gate 10 for the purpose of opening or closing thedischarge mouth 7. This late and its gate are preferably arranged in aplane inclined to the perpendicular.

11 indicates the filling tube which also provides the support. for theba 12, being lled. As shown, said tube is fixed at its rear end to thetop end of a bracket 13, caron one end of a scale beam 14 from theopposite end of which depends a scale weight 15. Said scale beam 14, issuitably mounted between its ends on a bearing 16, fixed on an I beam17, that extends across the top of a spillage hopper 18, located in aplane beneath the storage hopper 5. A conveyor 19 of any suitable type,operates to transfer .the spillage in the hopper 18, back into thestorage hopper 5.

filling tube 11 is cut away at one end to provide an elon ated dischargemouth 20 and has an angu arly disposed flange 21 at its oposite endwhich is adapted to en- 'gage against the mouth plate 9 before referredto, and to hold said filling tube in alignment with the discharge mouth7 when the bag is being filed. The filling tube includes a centralpassageway of comparatively large diameter, through which the materialasses from the discharge mouth into the Bag being filled and also one ormore parallel. conduits spaced from the material passageway, to providea vent for the air displaced from the bag by the filling material.

As shown in Figs. 1 to 3inclusive, there are provided in the top andbottom wall parts of the tube 11, two smaller conduits 2222, which openat one end through the front or discharge end of the tube and connect attheir other ends with annular channel 23, provided in the wall of thetube near its rear end. This annular'channel has vertically, oppositeopenings in bosses 24-24' on the tube 11 near the flange 21.

i e 25, the bot-tom end of which-includes spillage hopper 18. Connectedto the opening in the boss 2a, is a hose 26 which s connected by a valve2'? to a compressed air pipe .28 supported on the storage hopper 5. Thevalve 27 has a spring cont-rolled operating lever 29 which is adapted tobe momentarily engaged and actuated in the upward swing of the tube, bya jointed arm 30 to permit a jet of compressed air to pass through thevalve 27 and hose 26 and into the conduits 2:2, 22 and pipe 25. The arm30 extends upwardly from the bracket 13 and is adapted to be trippedfrom engagement with valve lever 29, by a cam projection 31, on thehopper 5, aS the filling tube moves into alignment with the dischargemouth 7.

In Fig. 4 is illustrated a cross section through a modified form offilling tube, which comprises radially arranged inner and outer tubes3i2-33 which are held in spaced relation by means of spacing studs 34,or the like. In this construction, the inner tube 32 defines thematerial passageway and the annular space 35 between said tubes definesa conduit which functions in the same manner as do the conduits 22-22before mentioned.

The operation is as follows: Assume that an empty paper valve bag 12,with its tied or otherwise closed top end arranged in an invertedposition, is placedupon the filling tube with the tube extending throughthe usual filling opening in normally its bottom end, and with its flapor valve 12, en aging the bottom side of said filling tube. he weight 15will actuate the beam 14 to swing the filling tube 11 into a positionwhereupon its flange 21 will engage against the plate 9, thus bringingthe filling tube into alignment with the discharge mouth 7 of thestorage or filling ho per 5.

As the fiiling tube approaches the discharge mouth 7, the jointed arm 30will engage the valve lever 29, and momentarily open the valve 27 topermit a jet of air to blow through the venting conduits to dislodgesuch material therein as tends to clog said conduits, and as the arm 30engages the cam 31. said arm is tripped from the lever 29 and the valve27 again closes.

Assume that the gate 10 has now been opened and the propeller 8 isrotating to feed the material through the mouth 7 into the tube 11 andout through its discharge mouth 20 into said bag. The material fallsinto the lowest part of the bag and such air as is in the bag and whichis now being displaced by the filling material entering th bag, cannotpass out through the walls of the bag but will pass into the ventingconduits in the filling tube, out through pipe 25 and into the spillagehopper, such fine dust-like particles as are carried out by said airbeing deposited in the spillage hopper to mix with such other materialas is theretherein.

in. This material is, of course, delivered back into the hopper 5 by theconveyor 19. As rapidly as the material enters the bag,

the displaced air is vented from the bag, so. pack there-v that thematerial may properly in. When the bag has thus been filled, its weightwill depress the long arm of the scale beam against the action of theweight 15 and the filling tube-with the filled bag thereon will moveaway from the discharge mouth 7 of the hopper 5. The gate 10 is closedand the filled bag is removed from the tube and placed on its bottomend, when the material in the bag will close'thc valve 12 against thefilling opening. Another empty bag is placed on the filling tube and theweight 15 will act to swing the beam 14: into a position wherein thefilling tube is again engaged against the discharge mouth 7. after whichthe gate 10 is opened and the filling of the bag proceeds as beforedescribed. Such material as is spilled in the filling ot the bag, fallsinto the hopper 18 and is transferred to the storage hopper by theconveyor 19. When the filled bag moves away from the mouth 7, theflexible end 25* of the pipe 25, will assume such a position as thematerial in the spillage hopper 18 compels it to,

Should any material be deposited in the venting conduits or pipe 25 inthe venting of the bag, this material is blown out of said tube, justbefore the start of the filling of each bag as before mentioned.

When cloth bags are being filled, instead of paper bags, the air isvented in the same manner, thus preventing the displaced air frompassing out through the interstices of the cloth bag and carrying withit such finer parts of the material as will pass through saidinterstices. Thus no material is wasted in dust clouds to settle down onthe surrounding community, nor does the operator have to work in anatmosphere, hea-viily laden with such dust particles.

My improved bag filling machine has many advantages :-it vents the bagsso that they may be completely filled with material, and will have thesolidarity required for the bags to withstand the handling to which theyare subjected. This does away with the necessity of jiggling or shakingthe bag to produce a settlement of the material The bags are easilyapplied to and removed from the tube, and any manner changing theoperator attending the same.

lVhile in describing my invention, I have referred to certain details ofmechanical construction and arrangement of parts, I do not wish to belimited thereto, except as may be pointed out in the appended claims.

I claim as my in ent-hm:

1. In a valve bag filling machine. a filling tube adapted to be insertedinto the valve this without in opening in one end of the bag, saidfillin jet of com tube having a passageway for the materia duit. withwhich the bag is to be filled, and avent- 5. In a bag fillin ingconduitwhich opens at one end within the tion of a storage h bag, andopens at its other end outside of mouth, a filling tu the bag, and meansfor cleaningout said into one e conduit. ing tube 2. In a valve bagfilling machine, a filling a bag ve tube adapted to be inserted into thevalve said fillin opening 1n one end of the bag, said filling hopperdischar tube having a assageway for the material pipe, a valve withwhich the ag is to be filled, and a ventoperable as th ing conduit whichopens atone end within the hopper discharge in bag, and opens at itsother end outside of opening said valve to e bag, and means providing aconnection compressed air into said for a fluid under pressure, with oneend of 6. In a bag tion of a stora 3. In a bag filling machine, thecombinamouth, a spillage h tion of a storage hopper having a dischargehopper, a filling tub mouth, a fillin tube adapted to be inserted edinto one end of a g a bag to be filled, means for for moving said fillinmoving said filling tube toward and away away from the h from the hop erdischarge mouth, and filling tube havi y the filling tube for ventopensat one e other end with 4. In a bag filling machine, the combinanectingsaid ventin tion of a storage hopper having a discharge spillage hopper.mouth, a fillin tube adapted to be insert- In testimony that I clai edinto one en of the bag to be filled, said as my invention, I aflix myfilling tube having a material passageway presence of two witnes and abag venting conduit, means for mov- November A. D., 1919.

said venting conduit.

into one end 0 means carried ing the bag.

ing said ling tube toward and away from the hopper discharge mouth, andmeans op- Witnesses:

H. H. VAN HAGAN, T

erable as the filling tube approaches the hopper discharge mouth fordischarging a pressed air into said venting cong machine, thecombinaopper having a d be adapted to be nd of the bag to be filled,having a material passage nting conduit, means for tube toward aischarge inserted said fillway and moving nd away from the ge mouth, acompressed air connected thereto and means g tube approaches the outh,for momentarily a jet of venting conduit.

chine, the combinapper having a discharge opper below said storage eadapted to be insertg to be filled, means g tube toward and opperdischarge mouth, said ng a venting conduit which nd within the bag andits he bag, and means cong passageway with the m the foregoing signaturein the ses, this 24th day of ALVA W. TYLER.

